Year 12s: what will be the first way you research your future options? >>

OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD

Scroll to see replies

Yes you will get ecf

Could someone please post a link to an unofficial markscheme that people can't edit? The googledocs one is a shambles haha

Reply 1902

ShannonD_1697

Original post by izaa29

For the percentage yield question I got something like 7.26 g

Omds I feel like I'm the only one who failed this paper

It was easy but I made so many silly mistakes :frown:

I'm so upset now

I got something like that too I think! Everyone else seems to have got 2.66g but I have no clue how! Can anyone explain how they did it?

Reply 1903

FluffyCommie

For the seven mark question at the end

the Alcohol: CH3CHOHCH(CH3)2

the Ketone: CH3COCH(CH3)2

the Carboxylic Acid: CH3CH2COOH

the Ester: CH3CH2COOCHCH3CH(CH3)2 (not sure of the structural formula of the ester) pls correct it

Reply 1904

President J

Original post by milutin767

what was that thing for lactic acid in bacteria/by chemical synthesis? i said something about getting a pure product rather than a mixture of products...

1 Optical isomer in fermentation. 2 OI in chemical syntheses.

Reply 1905

jadder1224

did anyone get these ?

Reply 1906

four4

If you get the compound F wrong, but were able to to do all the other compounds with ecf marks, how many marks out of 7 would you get?

Reply 1907

Gj-98

Was great banter 61/60 for a u

Reply 1908

Kflexman

Original post by Iamjos

But you dont know if the alkene groups are cis or trans. thats why I think its the saturated fatty acid

Yes! I was the only one who put stearic acid out of my friends. Surely the saturated fatty acid is worse for you than the unsaturated fatty acids!?

Reply 1909

sfarquhar0

Original post by Gj-98

Was great banter 61/60 for a u

totes agreed

Reply 1910

Kvothe the Arcane

Original post by Kflexman

Yes! I was the only one who put stearic acid out of my friends. Surely the saturated fatty acid is worse for you than the unsaturated fatty acids!?

I put saturated

But was nervous as the following questions were about it.

Reply 1911

sfarquhar0

Original post by four4

If you get the compound F wrong, but were able to to do all the other compounds with ecf marks, how many marks out of 7 would you get?

Maybe 4-5 ? I got F wrong also dw

Reply 1912

lai812matthew

Original post by Gj-98

Was great banter 61/60 for a u

it is hard

Reply 1913

SazahSauce

Original post by Kflexman

Yes! I was the only one who put stearic acid out of my friends. Surely the saturated fatty acid is worse for you than the unsaturated fatty acids!?

Yes the saturated is worse, I put that, you are correct

Reply 1914

j-smith1

Original post by yoda123

so pissed off because I only realised it was 4 carbon environments when she blew the whistle so I only got the marks for H on that one...
Didn't get the diester or the NH2 impurity one or J
What do you guys think the grade boundaries will be and did u find it harder than last year's paper? If the grade boundary is like 51 for an A i'm ****ed

I got 2.66

omg exactly the same for the carbon environments one! I'm really annoyed at myself because i figured it out so quickly after the whistle went! How many marks do you think we'd get for getting H only?